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6400 Mic connector wiring

Geoff AB6BT
Geoff AB6BT Member ✭✭✭
edited August 2019 in FLEX-6000 Signature Series
I can't seem to find a wiring diagram for the Mic connector on the 6400. The text in the hardware manual states that for an electret mic that bias is applied to the (+) terminal. Is the (+) terminal the tip? A typical PC mic connector is wired with bias to the ring, of an 1/8" TRS, and the mic audio output is available on the tip.

So, if I plug an electret mic with that configuration into the mic jack on the 6400 will that work? Or do I have to build an adapter?

Unless I've missed something, there is nowhere I have found that explains this clearly.

Thanks,
Geoff 


Answers

  • Jay Nation
    Jay Nation Member ✭✭
    edited May 2019
    Geoff
    The current FLEX-6400/FLEX-6600 Hardware Reference Manual on pages 27-29 shows the correct 
    pinout.

    http://www.flexradio.com/downloads/flex-6400-and-flex-6600-hardware-reference-manual-pdf/# 

    The Bias voltage will be on the Tip, when it's enabled.  

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  • Geoff AB6BT
    Geoff AB6BT Member ✭✭✭
    edited December 2018
    OK, I see that, thanks for pointing it out. Somehow I missed that.

    So, just to confirm, that means that a normally configured PC mic, with bias on the ring and audio on the tip, will not work.
  • Jay Nation
    Jay Nation Member ✭✭
    edited May 2019
    Geoff

    Correct, I think a homebrewed adapter would be possible though. 

        #FlexRadio IRC chat

    For real-time discussions

            SDRgadgets

    User created documentation.
               Volunteer!!

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  • Geoff AB6BT
    Geoff AB6BT Member ✭✭✭
    edited December 2018
    Right. I've got all the pieces so I'll build one. I just think it odd that Flex would use a non-standard configuration. I'm sure there was a reason behind the decision.

    Thanks for your help.

    73, Geoff
    AB6BT
  • Wayne
    Wayne Member ✭✭
    edited August 2018
    Cheap, Cheap, Cheap! Plus they can charge $40 for adapter cables.
  • Geoff AB6BT
    Geoff AB6BT Member ✭✭✭
    edited August 2019
    I don't see how the wiring configuration would change the cost in any way.

    And if people are unable to fab their own adapters then I think it is entirely reasonable to charge for T&M just like any other product.
  • Clay N9IO
    Clay N9IO Member ✭✭✭
    edited August 2018
    Totally agree Geoff. Many configs possible via the correct adapter.

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